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(No Model.) Y

J. BARRY.

OLINIGAL THERMOMBTER.

No. 358,141. Patented Feb. 22, 1887.

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JOHN BARRY, on NEW YORK, N. Y.

CLINICAL THERMOMETER.

QPBCIPICATION forming part of Letters Patent No. 358,141, dated February 22, 1887.

Application filed May 18, 1886. Serial No. 202,526. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN BARRY, of the city and State of New York, haveiuvented an Improvement in Clinical Thermometers, of which the following is a specification.

Thermometers that are made use of for ascertaining the temperature of the body at the mouth are usuallyinserted beneaththetongue. These thermometers are usually provided with a straight bulb, and with an indicator that is moved within the thermometer-tube by the expansion of the mercury in the bulb. In thermometers of this character the bulb is liable to slip out from beneath the tongue and not to remain in the proper position for ascertaining the heat of the body.

In my present improvement the indicator and the scale upon the thermometer-tube are of any ordinary or desired character, and the bulb is made as an arc of a circle, so that it will pass in beneath the tongue at the root thereof, and the curved form of the bulb will cause the same to remain in its proper position for being acted upon by the temperature of the body.

In the drawing I have represented my improved clinical thermometer by a plan View.

The tube A, having upon it the graduations B, and the index or indicator 0 within it are of ordinary character. The bulb D,instead of being straight or nearly straight, is an arc of a circle occupying a transverse position to the 7 tube A, and the tube and bulb are preferably connected in the middle,so that when the clinical thermometer is placed beneath the tongue the concave of the curved bulb rests against the root portion of the tongue, and hence the thermometer is thereby retained in its proper position beneath the tongue, and it is not liable to slip sidcwise or become displaced in the mouth.

Although I have shown the graduated tube as connected in the middle of the curved bulb, I do not limit myself in this particular, as the curved bulb may be connected at one end to the graduated tube and pass off laterally, as aforesaid.

I claim as my invention The combination, in a clinical thermometer, of a glass stem or tube, A, with a graduated surface, and an index within the tube, and a mercury-bulb at oneend of said tube,said bulb occupying a transverse position to the tube, substantially as specified.

Signed by me this 17th day of May, A. D. 1886.

JOHN BARRY.

WVitnesses:

GEo. T. PINOKNEY, WALLACE L. SERRELL. 

